Given an unsigned 32-bit integer \( x \), which of the following C/C++ expressions correctly toggles its bits starting from position \( p \) (with the least significant bit at position 0)?
Assume: \( x \) is the input integer; \( p \) is the starting position of the bit range (0-based, LSB at position 0); \( m \) is the number of bits to toggle; and no overflow or invalid input conditions occur. Which of the following correctly toggles \( m \) bits starting from position \( p \)?
How many triangles are there in the figure given below? 