Q. Consider the following statements::
1.Solitary waves are distinct electric field fluctuations that follow constant amplitude-phase relations.
2.The shape and size of solitary waves changes frequently during their propagation. 
3.Solitary waves are known to be responsible for the plasma energization and its transport in Earth’s magnetosphere.
Which of the statements given above are correct?

[A] 1 and 2 only

[B] 2 and 3 only

[C] 1 and 3 only

[D] 1, 2 and 3

Answer: C
Notes:

Explanation –

Statement 1 and 3 are correct. Solitary waves are distinct electric field fluctuations that follow constant amplitude-phase relations. Solitary waves are known to be responsible for the plasma energization and its transport in Earth’s magnetosphere.

Statement 2 is incorrect. The shape and size of solitary waves are less affected during their propagation.

Source: ForumIAS