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Option 4 : The data I the both the statement I and II together are necessary to answer the question
We use propositional logic to solve this.
Statement I: If Ram studies hard for exam, his father will gift him a laptop.
Let s: Ram studies hard for exam.
g: Ram gets a laptop.
Given that s ⇒ g.
Thus, from statement I we cannot conclude whether Ram gets a laptop or not. Thus nothing can be said whether Ram had worked hard or not.
Statement II: Ram did not get a laptop.
Nothing is said about the hard work.
Combining both statements we get,
Therefore, we can conclude that Ram did not study hard. So, both statements together are necessary to determine the given conclusion.
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