Explanation:

Statement 1 is correct: Oil drilling falls into one of two main categories: offshore and onshore. The location of the drilling is the most obvious difference, but the two types vary in other areas, including cost, profits, timelines for drilling and processes.India has both on-shore as well off-shore reserves of Natural Gas. One of the off-shore reserves is near Mumbai High in Arabia Sea.
Statement 2 is not correct: Majority of the Natural Gas Reserves are concentrated in the Eastern and North-Eastern India.
Onshore drilling refers to drilling deep holes under the earth s surface whereas offshore drilling relates to drilling underneath the seabed.
These drilling methods are used in order to extract natural resources - usually oil and gas -from the earth. While extracting oil from below the surface of the ocean used to be much more difficult than the traditional onshore drilling method of making wells on land and drilling holes, offshore drilling has become easier through the innovative methods that have surfaced such as making either floating or fixed platforms on the bed of the ocean to support drilling.
Natural gas is a gaseous fossil fuel consisting primarily of methane. In India production of natural gas has increased over 3 times in the last two decades though the share of the production of natural gas with respect to world natural gas production is only 0.6% at the end of 2005 and reserve to production ratio of 36.2