The Tropical Deciduous Forest area comprises which districts?

• aMymensingh, Tangail, Gazipur, Dinajpur and Rangpur
• bChattogram, Khagrachori, Rangamati, Bandarban
• cKhulna, Bagerhat, Satkhira, Patuakhali
• dSylhet, Sunamganj, Habiganj