If channel length modulation is neglected, what is the voltage gain of the following circuit?

• A. – {gm1 * Rd * gm2 * Rd1}
• B. gm1 * Rd * gm2 * 2Rd1
• C. – {gm1 * Rd * 2gm2 * Rd1}
• D. gm1 * 2Rd * gm2 * Rd1