Consider the following two sets of LR(1) items of an LR(1) grammar.

X → c.X, c/d	X → c.X, $
X → .cX, c/d	X → .cX, $
X → .d, c/d	X → .d, $

Which of the following statements related to merging of the two sets in the corresponding LALR parser is/are false?
1. Cannot be merged since look aheads are different.
2. Can be merged but will result in S-R conflict.
3. Can be merged but will result in R-R conflict.
4. Cannot be merged since goto on c will lead to two different sets.