Option D: Both Statement-1 and Statement-2 are not sufficient to answer the Question.
To determine who is sitting on the immediate left of A, we need to analyze the given statements:
     ● Statement-1: B is sitting opposite to C and D is sitting opposite to E.  
           ○ This statement tells us the opposite pairs: B-C and D-E. However, it does not provide any information about the position of A or F relative to these pairs. Therefore, this statement alone is not sufficient to determine who is sitting on the immediate left of A.
     ● Statement-2: F is sitting on the immediate left of B.  
           ○ This statement provides the position of F relative to B, but it does not give any information about the position of A. Without knowing where A is in relation to B and F, we cannot determine who is on the immediate left of A. Therefore, this statement alone is not sufficient.
     ● Combining Statement-1 and Statement-2:  
           ○ Even when combining both statements, we have the following arrangement possibilities:
         1. B opposite C, D opposite E, and F on the immediate left of B. However, A's position is still undetermined.
         2. The circular nature of the arrangement allows for multiple configurations where A can be placed in different positions relative to B, C, D, E, and F.
     Since neither statement alone nor both statements together provide enough information to determine the exact position of A, we cannot conclusively identify who is sitting on the immediate left of A. Therefore, the correct answer is Option D.