Rule 18 Use of answers to interrogatories at trial

A party may put in evidence at the trial of the proceedings, or of any issue therein, some only of the answers to interrogatories, or part only of such an answer, without putting in evidence the other answers or, as the case may be, the whole of that answer, but [^f1 the judge or district judge as the case may be] may look at the whole of the answers and if of the opinion that any other answer or other part of an answer is so connected with an answer or part thereof used in evidence that the one ought not to be so used without the other, [ the judge or district judge as the case may be] may direct that that other answer or part shall be put in evidence.]