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Que. Match all items in Group 1 with correct options from those given in Group 2.

Group 1 Group 2

P. Regular expression 1. Syntax analysis
Q. Pushdown automata 2. Code generation
R. Dataflow analysis 3. Lexical analysis
S. Register allocation 4. Code optimization
a. P-4. Q-1, R-2, S-3
b. P-3, Q-1, R-4, S-2
c. P-3, Q-4, R-1, S-2
d. P-2, Q-1, R-4, S-3
Answer:P-3, Q-1, R-4, S-2
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