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If we merge states in LR(1) parser to form a LALR(1) parser, we may introduce
  1. shift-reduce conflict
  2. reduce-reduce conflict
  3. no extra conflict
  4. both shift-reduce as well as reduce-reduce
in Compiler Design by Veteran (422k points) | 169 views
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B. we can only introduce R-R conflicts.

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+1 vote
ans is B.

It is because we construct LALR parsing table by merging states of CLR(1) which are only separated by look a heads. In doing so we may merge states which introduce R-R conflicts
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