**Core Concept**
Vaginal candidiasis, also known as vulvovaginal candidiasis (VVC), is a type of fungal infection caused by Candida species, particularly Candida albicans. This infection affects the vagina and vulva, leading to symptoms such as itching, burning, and discharge.

**Why the Correct Answer is Right**
The correct answer will be the statement that is not true about vaginal candidiasis. To determine this, let's examine each option.

**Why Each Wrong Option is Incorrect**
**Option A:** Candida albicans is the most common cause of vaginal candidiasis. This statement is true, as C. albicans is responsible for the majority of VVC cases.
**Option B:** Vaginal candidiasis is often associated with diabetes mellitus. This statement is also true, as people with diabetes are more prone to developing VVC due to their altered glucose metabolism.
**Option C:** Vaginal candidiasis is characterized by the presence of pseudohyphae and blastoconidia on wet mount examination. This statement is true, as these morphological forms are characteristic of C. albicans and can be seen on a wet mount examination of the vaginal discharge.
**Option D:** Vaginal candidiasis can be treated with topical antifungal agents such as miconazole and clotrimazole. This statement is true, as these agents are commonly used to treat VVC.

**Clinical Pearl / High-Yield Fact**
To remember the treatment options for vaginal candidiasis, the mnemonic "MCC" can be used, where M stands for miconazole, C stands for clotrimazole, and C stands for other topical antifungal agents.

**Correct Answer: D. Vaginal candidiasis can be treated with topical antifungal agents such as miconazole and clotrimazole.**