https://www.adda247.com/question-answer/an-object-placed-30-cm-from-a-concave-lens-forms-a-virtual-erect-image-at-a-distance-of-10-cm-from-the-lens-the-magnification-produced-by-the-l/q.v1.1c0ee1fe-7751-4100-9989-bc8d325fb989-en
The correct option is DGiven:v = image distance = -10 cmu = object distance = -30 cm (negative sign for object on the left side of the lens)
concave lensobjectplacedcmforms