With respect to external fertilization, which of the following is not an advantage of internal fertilization?
(1) A decreased risk of disease transmission
(2) Minimal waste of gametes
(3) Greater chances of individual egg fertilization
(4) Relatively longer time of egg protection
(1) Page 14/15, XII NCERT
Advantages to external fertilisation include: minimal contact and transmission of bodily fluids; decreasing the risk of disease transmission, and greater genetic variation (especially during broadcast spawning external fertilisation methods).