9 seconds                
                                            
                    10 seconds                
                                            
                    9 seconds                
                                            
                    10 seconds                 
                            
            
            Answer is Right!
            Answer is Wrong!
        The correct answer is (b).
A clock takes seven seconds to strike seven because it has seven chimes. Each chime takes one second. To strike ten, the clock will need to chime ten times, which will take ten seconds.
Option (a) is incorrect because it is the time it takes the clock to strike seven. Option (c) is incorrect because it is the time it takes the clock to strike nine. Option (d) is incorrect because it is the time it takes the clock to strike ten.