The logic followed is: 1) 'Spoken English' book can improve English speaking abilities. Assumption 1 is implicit. If you read the book 'Spoken English', your English speaking abilities improve. The statement clearly suggests that reading 'Spoken English' book improves English speaking abilities. 2) A regular practice of speaking English during conversation can improve English speaking abilities. Assumption 2 is not implicit. The statement does not mentions anything about regular practice of speaking English, so it is not implicit in the statement. Hence, 'Only assumption 1 is implicit'. Additional Information Read the statement with an approach that the assumptions would be true about the statement. Do not go too logical with the statements. Analyze the given information and the assumption must only be made based on the information in the statement. Do not over-complicate it. Common assumptions can always be followed but other than that do not align the statement with General Knowledge or other facts Use the elimination method if you are unable to apprehend the answer. Read the statement and then the assumptions given in the options, you shall notice that a few of them will most definitely not follow. Eliminate them and then choosing from lesser options may prove to be more convenient One thing to note is that the assumption is something that the author believes to be true, so while choosing the correct option, keep this thought in mind. If any option contradicts the statement, then that assumption will not follow.