Step 1:
Kalidasa is renowned for the beautiful use of similes (Upama Alankara).
Hence, the statement:
\[
\text{``Upama Kalidasasya''}
\]
is correct.
Step 2:
Bharavi is famous for depth and gravity of meaning.
\[
\text{``Bharaverarthagauravam''}
\]
is therefore also correct.
Step 3:
Reason R describes Bharavi’s literary style but does not explain Kalidasa’s expertise in similes.
Step 4:
Thus:
\[
\boxed{\text{Both A and R are correct but R is NOT the correct explanation of A}}
\]
Hence, the correct answer is:
\[
\boxed{\text{(2)}}
\]