Which of the following correctly summarizes the life cycle of fern plant?

• A Spore → prothallus → thallus → sporangium
• B Male and female gamentangia → zygospores → sporangium → spores
• C Spore → thallus → spermatozoa + ovum → sporangium
• D Prothallus → spermatozoid → +egg cell → leafy plant → sporangium → spore