The multitude of Middle Iranian languages and peoples indicate that great linguistic diversity must have existed among the ancient speakers of Iranian languages. Of that variety of languages/dialects, direct evidence of only two have survived. These are:
How many of the Middlie Iranian tongues have remained in existence since ancient time?
two

By the early 18th century, the Maratha Kingdom had transformed itself into the Maratha Empire under the rule of the Peshwas (prime ministers). In 1737, the Marathas defeated a Mughal army in their capital, Delhi itself in Battle of Delhi (1737). The Marathas continued their military campaigns against Mughals, Nizam, Nawab of Bengal and Durrani Empire to further extend their boundaries. Gordon explained how the Maratha systematically took control over new regions. They would start with annual raids, followed by collecting ransom from villages and towns while the declining Mughal Empire retained nominal control and finally taking over the region. He explained it with the example of Malwa region. Marathas built an efficient system of public administration known for its attention to detail. It succeeded in raising revenue in districts that recovered from years of raids, up to levels previously enjoyed by the Mughals. For example, the cornerstone of the Maratha rule in Malwa rested on the 60 or so local tax collectors who advanced the Maratha ruler Peshwa a portion of their district revenues at interest. By 1760, the domain of the Marathas stretched across practically the entire subcontinent. The north-western expansion of the Marathas was stopped after the Third Battle of Panipat (1761). However, the Maratha authority in the north was re-established within a decade under Peshwa Madhavrao I. The defeat of Marathas by British in third Anglo-Maratha Wars brought end to the empire by 1820. The last peshwa, Baji Rao II, was defeated by the British in the Third Anglo-Maratha War. With the defeat of the Marathas, no native power represented any significant threat for the British afterwards.
Who ruled the Maratha Empire?
Peshwas

There is evidence of induced copper deficiency in those taking 100–300 mg of zinc daily. A 2007 trial observed that elderly men taking 80 mg daily were hospitalized for urinary complications more often than those taking a placebo. The USDA RDA is 11 and 8 mg Zn/day for men and women, respectively. Levels of 100–300 mg may interfere with the utilization of copper and iron or adversely affect cholesterol. Levels of zinc in excess of 500 ppm in soil interfere with the ability of plants to absorb other essential metals, such as iron and manganese. There is also a condition called the zinc shakes or "zinc chills" that can be induced by the inhalation of freshly formed zinc oxide formed during the welding of galvanized materials. Zinc is a common ingredient of denture cream which may contain between 17 and 38 mg of zinc per gram. There have been claims of disability, and even death, due to excessive use of these products.
What kind of deficiency is common from taking 100-300mg of zinc daily?
copper