1. "It is not raining and it is pleasant" can be written as $(¬p∧r)$
2. Now, "it is not pleasant only if it is raining and it is cold" is represented by $¬r\implies (p∧q)$ but $(p∧q) \not\implies ¬r $. Why? Because if it is not pleasant then we can conclude it must be raining and it is cold. However, it is raining and cold does not assure that it will be unpleasant. i.e., $p$ only if $q$ can be written as if $p$ then $q$ (not double implication).
So, ANDing clause $1.$ and $2.$ we get $(¬p∧r)∧(¬r→(p∧q))$
option A is correct.