**Question:** Risk factor for cervical carcinoma is -

A. Old age
B. Smoking
C. Human papillomavirus (HPV) infection
D. Parity

**Core Concept:** Cervical carcinoma is a type of cancer that develops in the cells of the cervix uteri (lower part of the uterus), often caused by persistent infection with high-risk human papillomavirus (HPV) types. The disease is associated with several risk factors that contribute to the development of the cancerous cells.

**Why the Correct Answer is Right:** Cervical carcinoma is primarily caused by the persistence of high-risk HPV types, which leads to the dysregulation of cellular processes and the development of cancerous cells. HPV is a virus that infects the basal cells of the squamous epithelium of the cervix and gradually progresses from cervical intraepithelial neoplasia (CIN) lesions to invasive cervical carcinoma.

**Why Each Wrong Option is Incorrect:**

A. **Old age:** While age is a risk factor for cervical carcinoma, HPV infection is the primary cause. HPV is more prevalent in younger individuals, and the risk of progression to invasive cancer increases with age.

B. **Smoking:** While smoking is associated with an increased risk of HPV infection and cervical dysplasia, it is not the primary risk factor for cervical carcinoma. HPV infection remains the key factor in the development of cervical carcinoma.

C. **Parity:** Parity (number of times a woman has given birth) is a risk factor for cervical carcinoma as it increases the duration of exposure to the cervix to HPV, a crucial factor in cervical carcinogenesis.

**Clinical Pearl:** A thorough understanding of the primary risk factors for cervical carcinoma, particularly HPV infection, is essential in preventing and managing this malignancy. HPV vaccination and cervical screening programs (e.g., Pap test) can significantly reduce the incidence of cervical carcinoma. Early diagnosis and treatment of precancerous lesions can prevent progression to invasive cancer.