1.A person can see objects only at a distance greater than 40 cm40\,\text{cm}40cm. He is advised to use a lens of powera.+2.5 D+2.5\,\text{D}+2.5Db.+1.5 D+1.5\,\text{D}+1.5Dc.−2.5 D-2.5\,\text{D}−2.5Dd.−6.25 D-6.25\,\text{D}−6.25DLogin to continueOnly logged in users canattempt or see the solution.
