The correct option is C Brachysclereids
Edible part of pear fruit is gritty due to brachysclereids. They are a group of sclerenchyma cells that are more or less isodiametric. Because they are not fibre like sclerenchyma cells, they are sclereids and because they are very close to being round, they are brachysclereids, also known as stone cells. The ground tissue between the masses of brachysclereids is parenchyma. Each cluster contains many brachysclereids and the clusters are large enough to see with the naked eye when you eat a pear.
Thus, the correct answer is option C.