Explanation:
When a program is executed, it is divided into segments, which are logical divisions of the program's code and data. Each segment has its own memory space and address range. The location to which control is transferred refers to the destination address where the program jumps to execute the next set of instructions.

Intersegment Mode:
In intersegment mode, the destination address lies in a different segment than the current one. This means that the control is transferred from one segment to another segment. Intersegment mode allows programs to call functions or subroutines located in different segments and facilitates the sharing of code and data among different segments.

Direct Mode:
In direct mode, the destination address is directly specified in the instruction. The control is transferred directly to the specified address without any further processing. In the context of intersegment mode, direct mode implies that the destination address in the different segment is directly specified in the instruction.

Indirect Mode:
In indirect mode, the destination address is not directly specified in the instruction. Instead, the instruction contains a memory location that holds the actual destination address. The control is transferred indirectly by fetching the destination address from the specified memory location. In the context of intersegment mode, indirect mode implies that the destination address in the different segment is obtained indirectly from a memory location.

Intersegment Direct and Indirect Mode:
The correct answer is option D, which states that the mode is intersegment direct and indirect. This means that the control can be transferred from one segment to another segment either in direct mode or indirect mode. The choice between direct and indirect mode depends on how the destination address is specified in the instruction.

In summary, intersegment direct and indirect mode refers to the transfer of control from one segment to another segment, where the destination address can be specified either directly in the instruction or indirectly through a memory location. This mode enables the execution of code and data located in different segments, promoting modularity and code reuse in a program.