Which among the following is an important mineral of Pegu Yoma region of Myanmar?

1. A

   Mineral Oil

   Mineral Oil. Pegu Yoma region in Myanmar is well known for its petroleum and mineral oil reserves, making this the correct option.

2. B

   Tin

   Tin. Tin is found in other regions of Myanmar such as the Tenasserim range, not primarily in the Pegu Yoma hills.

3. C

   Copper

   Copper. Major copper deposits in Myanmar are located in places like Monywa, rather than the Pegu Yoma tract.

4. D

   Silver

   Silver. Silver is predominantly mined in the Northern Shan State, particularly at the Bawdwin mine, not in Pegu Yoma.

Summary. Official key is (a) Mineral Oil. The Pegu Yoma region is the central lowland tract of Myanmar famous for its significant petroleum deposits. Other options like tin, copper, and silver are associated with different mineral belts across the country. Recognizing these specific regional mineral distributions prevents common geographical mix-ups. Therefore, mineral oil is the correct and definitive choice for the Pegu Yoma area.