Q. If variable a is host variable and dev_a is a device (GPU) variable, to copy input from variable a to variable dev_a select correct statement:

• (A) memcpy( dev_a, &a, size);
• (B) cudamemcpy( dev_a, &a, size, cudamemcpyhosttodevice );
• (C) memcpy( (void*) dev_a, &a, size);
• (D) cudamemcpy( (void*) &dev_a, &a, size, cudamemcpydevicetohost );