Matching the cases: a. *Birendra Kumar Ghosh v. Emperor* (act done in furtherance of common intention, Section 34 IPC); b. *R v. Prince* (absolute liability, no defense of mistake); c. *Dudley v. Stephens* (necessity no defense in murder); d. *R v. Tolson* (mistaken belief as defense). The correct match is a-3, b-4, c-2, d-5. Thus, the correct answer is:
\[
{\text{a-3, b-4, c-2, d-5}}
\]