Which districts are included in the evergreen zone?

• aChattogram, Khagrachori, Rangamati, Bandarban and Sylhet
• bKushtia, Jessore, Khulna, Satkhira, Bagerhat
• cMymensingh, Tangail, Gazipur, Dinajpur, Rangpur
• dDhaka, Faridpur, Manikganj, Munshiganj, Narayanganj