50.
									
										The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in
									
								
															
														
																									
										A:
											Bile duct and Bronchioles 
									
																										
										B:
											 Fallopian tubes and Pancreatic duct 
									
																										
										C:
											 Eustachian tube and Salivary duct 
									
																										
										D:
											Bronchioles and Fallopian tubes
									
																								 
							
																
									The answer is:
										D