Option (B) is incorrect because the agricultural marketing system primarily includes:
Assembling: Collection of produce from farms.
Storage and Transportation: Safeguarding and moving produce to markets.
Processing: Converting raw produce into finished goods.
Grading and Packaging: Preparing produce for sale.
Distribution: Delivering goods to consumers or retailers.
Option (B) incorrectly includes Production, which is a part of the agricultural sector but not of the marketing system. Marketing begins only after production is completed.

A ladder of fixed length \( h \) is to be placed along the wall such that it is free to move along the height of the wall.
Based upon the above information, answer the following questions:
(iii) (b) If the foot of the ladder, whose length is 5 m, is being pulled towards the wall such that the rate of decrease of distance \( y \) is \( 2 \, \text{m/s} \), then at what rate is the height on the wall \( x \) increasing when the foot of the ladder is 3 m away from the wall?