Threads of a process sharea.Global variables but not heapb.Both heap and global variablesc.Neither global variables nor heapd.Heap but not global variables

Threads of a process share both heap and global variables. So, the correct answer is b. Both heap and global variables.

Here's why:

1. Global Variables: All threads of a process share the global variables, as they are stored in the global memory area, which is accessible to all threads.

2. Heap: The heap is also shared among all threads of a process. When a process is created, it gets a heap segment where it can dynamically allocate memory. All threads can allocate, deallocate, and access memory on the heap.

So, threads of a process share both global variables and heap.