Cancer Epidemiology

Which of the following is the most common cancer in India according to the latest epidemiological data?

According to the Globocan 2020 data, which age group shows the highest incidence of cancer globally?

A 52-year-old woman from urban Delhi with a 20-year history of oral tobacco and betel nut chewing presents with a non-healing ulcer on the buccal mucosa and difficulty swallowing. Biopsy confirms squamous cell carcinoma of the oral cavity. She has no significant smoking history. Which of the following epidemiological factors is MOST relevant to the aetiology of oral cancer in this patient's demographic?

According to the WHO classification, which of the following carcinogens is classified as Group 1 (definite human carcinogen)?

A 52-year-old woman from rural Maharashtra presents with a 6-month history of progressive dysphagia and chest discomfort. She reports a long-standing habit of chewing betel quid with tobacco and slaked lime daily for 25 years. On examination, she appears cachectic. Upper endoscopy reveals a 4 cm ulcerated lesion in the mid-esophagus with irregular margins. Biopsy confirms squamous cell carcinoma. Which of the following epidemiological factors is MOST significantly associated with her cancer risk in the Indian context?