The correct answer for this question is option 2, which states that both statement 1 and 2 are correct. Let`s analyze each statement to understand why.

Statement 1: It says that seismic sensitivity is found in zones where one plateau joins the other with a discordant junction. This means that when two plateaus meet at an angle or mismatched alignment, it can create a seismic sensitive zone. This is because the rocks and tectonic plates in these areas are under stress and can cause earthquakes.

Statement 2: It states that seismic sensitivity is found in zones where a mountain and an alluvial plain join each other with a fault. This means that when a mountain and a flat plain made up of loose sediment (alluvium) are connected by a fault, it can create a seismic sensitive zone. The fault acts as a weak point where energy can be released, resulting in earthquakes.

Statement 3: It suggests that seismic sensitivity is found in zones where an alluvial plain joins the other with a subterranean fault. However, this statement is incorrect as it is not mentioned in the question. Therefore, the correct answer is option 2 - statements 1 and 2.

In conclusion, seismic sensitivity is indeed found in zones where