In each question, the first and the last sentences of the passage are numbered 1 and 6 respectively. The rest of the passage is split into four parts. These four sentences are jumbled. Read the sentences and identify their correct and logical order. 1 : Though the exact dimensionsP : involved in the rocketQ : and the precise amountsR : it is clear that such a large scale operationS : are yet to be ascertained6 : could not have been possible without the connivance of officials at various levels.The Proper sequence should be: