A patient presents with lower gastrointestinal bleed. Sigmoidoscopy shows ulcers in the sigmoid. Biopsy from this area shows flask-shaped ulcers. Which of the following is the most appropriate treatment -

• MC site of amebic colitis: Cecum and ascending colon. • Flask shaped ulcers on colonoscopy confirms the diagnosis of amebic colitis. • Asymptomatic carrier: Luminal agents (Iodoquinol, paromomycin). • Acute colitis: Metronidazole and luminal agents. • Amebic liver abscess: Metronidazole, tinidazole and luminal agents.