**Core Concept**
Oral contraceptive pills (OCPs) contain synthetic hormones, primarily estrogen and progesterone, which can modulate various physiological processes beyond contraception. These non-contraceptive benefits are attributed to the hormonal effects on the reproductive and non-reproductive systems.

**Why the Correct Answer is Right**
OCPs are used to manage conditions like dysmenorrhea, menorrhagia, and premenstrual syndrome (PMS) due to their ability to regulate menstrual cycles and reduce prostaglandin production. They also provide protection against iron deficiency anemia by reducing menstrual blood loss. Additionally, OCPs can help alleviate symptoms of endometriosis and are used in the treatment of acne and hirsutism in women with polycystic ovary syndrome (PCOS). The non-contraceptive benefits of OCPs are primarily attributed to their estrogenic and progestogenic effects on the reproductive and endocrine systems.

**Why Each Wrong Option is Incorrect**
**Option A:** This option is incorrect as OCPs have been found to have a protective effect against osteoporosis, particularly in postmenopausal women, by increasing bone density.
**Option B:** This option is incorrect as OCPs have been shown to increase the risk of venous thromboembolism (VTE), a condition characterized by blood clots in the deep veins of the legs or lungs.
**Option C:** This option is incorrect as OCPs can actually increase the risk of certain cancers, including hepatocellular carcinoma, cholangiocarcinoma, and possibly cervical cancer, although the latter is a topic of ongoing debate.

**Clinical Pearl / High-Yield Fact**
It's essential to weigh the benefits and risks of OCPs in each individual patient, considering factors like age, medical history, and lifestyle.

**Correct Answer: B.**