Suppose,
$A$ means Akash attends the party
$B$ means Bharani attends the party
$C$ means Chetan attends the party
$D$ means Deepa attends the party
Now, according to given questions :-
$B\wedge C \rightarrow D \\ \sim B \rightarrow \;\sim A$
$\sim D \rightarrow \; ?$
Here,
$B\wedge C \rightarrow D$ is equivalent to $C \wedge \sim D \rightarrow \sim B$
Now, from $C \wedge \sim D \rightarrow \sim B$ and $\sim B \rightarrow \;\sim A$
$C \wedge \sim D \rightarrow \sim A$
and it is equivalent to $A \wedge C \rightarrow D$ which is also equivalent to $\sim D \rightarrow \sim A \vee \sim C$
So, Answer is (C)