Task: Question Answering
Input (English): Problem: in triangle pqr, the angle q = 90 degree, pq = 4 cm, qr = 8 cm. x is a variable point on pq. the line through x parallel to qr, intersects pr at y and the line through y, parallel to pq, intersects qr at z. find the least possible length of xz
Options: a. 1.2 cm, b. 2.4 cm, c. 4.8 cm, d. 2.16 cm, e. 3.2 cm
Output (English): e