(91) (Choose only one answer) A solution to the Readers and Writers problem is given below. Which of the following statements is TRUE? int reader=0; semaphore read_mutex=1, data_mutex=1; process reader() { while (true) p(read mutex); reader=reader+1; if (reader=-1) p (data_mutex); v (read mutex); -- read data -- p (read_mutex): reader=reader-1; if (reader==0) v (data_mutex) v (read_mutex); process writer() { while (true)! -- execute -- p(data_mutex); -- write data -- v(data_mutex); 1 } a Indefinite postponement may occur. b. Deadlock may occur. c. Semaphores are used for synchronization in this solution. d. data mutex should have been initialized to O instead of 1