Which of the following statements is true regarding chlamydia?

Neisseria gonorrhoeae and chlamydia trachomatis can both result in neonatal eye infections.

Infection with the lymphogranuloma (LGV) strain of chlamydia is the most common cause of pelvic inflammatory disease (PID).

Antibiotic resistance is more common after infection with Chlamydia trachomatis than after infection with Neisseria gonorrhoeae.

Chlamydia trachomatis is a gram-negative diplococcus.

In women, chlamydial infection usually affects clitoris and vagina.