Step 1: Recall the Background:
Link the famine of 1943 in Bengal with the artist who was a social realist and printmaker. The medium words (linocut, etching, lithograph) and the subject (poor people suffering) are the clues.
Step 2: Test every option one by one:
1. Ganesh Pyne: his themes are fantasy and memory, not documentary famine prints, so he is not the match.
2. G. R. Santosh: he worked with abstract tantric symbols, so he does not match a realist famine record.
3. Paritosh Sen: he painted urban life and was a member of a group of modernists, but not the famine printmaker.
4. Chittoprasad: he is the artist who recorded the famine in linocuts and sketches, so this is the match.
Step 3: Confirm the result:
Only option 4 (Chittoprasad) passes the test above, and the other three fail for the reasons given. This also agrees with the standard fact: Chittaprosad Bhattacharya (Chittoprasad) travelled through Bengal during the famine of 1943 and made sketches, linocuts and lithographs of starving people. His work was published in the book Hungry Bengal.
Final Answer:
Option 4, Chittoprasad.
\[\boxed{4}\]